Rotary machine



F. EGERSDRFER.

ROTARY MACHINE.

I y APPLICATION FILED SEPT. 10, 1920. 1,4246.,

Patented July 18, 1922.V

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Speccaion of Letters Patent.

Patented July 18, 1922.

Application led September 10, 192C. Serial No. 409,502.

(GRNTED UNDER THE PROVISIONS 0F THE ACT 0F MARGH 3, 1921, l STAT. L., 1313.)

To all 207mmz' may eminem Be it known that l, Farra Eennsnnrnn, a. citizen of Germany, residing at Charlottenburg, Germany, have invented certain new and useful improvements in Rotary Ma' chines (for which I have filed application in Germany, Aug. 25, 1913; in Sweden, Apr. Q2. 1919, Patent No. -el-625, Mar. 3, 1990; in Denmark, ifipr. 98, 1919; in Switzerland, May 19, 1919; in Norway, May 16, 1919;l in France, Maw' 30, 1919; in Holland, June 6, 1919; in Spain, JunelQ, 1919; in Czech@` Slovakia Clot, 1, 1919) and 1 do hereby declare Athe following` to be a full. clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to imlni'ovements in rotary machines, and more particularly in `machines of that class in which a rotary pise ton provided with radially movable blades is eccentrically i'nounted within a stationary casing. ln order to reduce the friction of the radially movable blades it has been proposed to guide the said blades at their ends between disks which take part in the rotation of the piston, and the Said disks have for this purpose been fixed to the piston. Such guide members or disks have also been made integral with the piston, and in such casesthe casing enclosingthe piston has been axially divided in order to permit the piston to be mounted within the same. The object of the improvements is to provide a machine of this class, in which the blades are guided at their ends between lateral members which are integral with the piston, and in which the piston is mounted within a casing which is not axially divided. With this and other objects in view my invention consists in the matters to be described hereinafter and particularly pointed out in the appended claims. For the purpose of explaining the invention an example embodying` the same has been shown 1n the accompanying` drawing in which the same letters of reference have been used in all the'views to indicate corresponding` parts.

In said drawings- Fig. 1 is a longitudinal section of the machine, and

Fig. 2 is a cross section taken on the line 2*2 of rig. i.

ln describing the invention reference will such diameter that chine the sleeve 5 can be pushed over the ,with a removable venlarged cylindrical chamber is formed by vand between casing 1 and cylindrical part 9, and within this chamber a sleeve 5 is fitted whose cylindrical bore though axially par` allel with is eccentrically placed" relatively to the bearings for the piston shaft presentlyy to be described.- ln the preferred form shown in thefigures the sleeve 5 is provided at its ends with flanges 5 by means of which it is securely held against rotation between shoulders provided by the parts 1 andQ of the casing. rl`he casings 1, 2 is provided with bushings 6 which afford bearings for a rotary shaft 7, 8. At the part which Kis located within the enlarged rcylindrical chamber the shaft 7, 8 is formed with the piston parts 9, 19, 13 which are made integral with the shaft. ln the example shown in the iigures the diameter of the portion 10 of the piston corresponds to the in ner diameterl of the flange 5 of the sleeve 5, and the portion 9 of the said piston is of in assembling the masame. But the portion 9 is further provided and replaceable ring-like extension 11, which being,- for the purpose of assembly removed may after the sleeve 5 has been pushed over the piston be secured. F or screwing` the screws 12 into the piston holes 12 are provided in flange 5, as is shown in Fig. 1 in dotted lines. Between the outer portions 9 and 10 of the piston the part 13 is formed. It has, substantially radial slots or pockets, and the portions 9 and 10 and the ring 11 are formed at their inner sides with opposite radial grooves 1e. The said pockets and radial grooves provide guideways for blades 15 which are adapted to be shifted within the pockets in such a way, that in the course of the rotation of the piston they are alternately withdrawn into the piston or projected therefrom, as is shown in Fig. 2. Such reciprocating rewish it to be movement of the blades is effected on piston rotation by the fact that the inner face ot the sleeve is eccentrically disposed with re` spect to the axis of the turning of the piston, together with the fact that the blades are arranged in diametrically opposite pairs and are interconnected pair by pair by rods 27 the over-all length of each pair exceeding the diameter ot the piston portion 18 and being substantially that ot the bore oi' sleeve 5. By and between the inner tace of the sleeve 5, the outer tace of piston 13 and the blades 15, chambers are formed, the capacity of which is as the shaft rotates alternately reduced and increased, and the said chambers are adapted alternately to be brought in communication with ports 17 and 17', through which a 'fluid is admitted and discharged. For example, in case the ma chine is used as an engine, the driving fluid is admitted through the port 17 and allowed to escape through the port 17, and in case it is used as a pump or compressor the fluid to be pumped or compressed may be drawn in through the passage 17 and driven out through the passage 17. rlhe l'luid is admitted to the port 17 and discharged from the port 17 through an inlet passage 18 and an outlet passage 1S', which are connected with suitable pipes.

In case the machine is to be used with iiuid under high pressure l prefer to itorm sleeve 5 with the lateral flanges 5 described, embracing the portions 9, 11 and 1() ot the piston, so as to close the pressure chambers of the piston in a tight manner. Between the outer faces ot the said flanges and the adjacent shoulders ot the casings 1, 2, l may provide rings 19 o1c copper or other suitable material adapted to provide a tight packing. l? or the same reason 1 provide packing rings 2O between the bushings 6 and the adjacent faces of the portions 9 and 10 of the piston. By means ot the said rings 19 and 2O the chamber formed by and between sleeve 5 and piston 13 is closed in a tight manner.

1n assembling my improved machine the blades 15 are first placed within their pockets in the mid-portion 13 of the piston. Thereupon the sleeve 5 is shifted over the piston, until its right hand {iange 5 lits ov r the piston part. The ring 11 is then pushed over -the portion 9 of the piston and the screws 12 are screwed into the piston by inserting them through the holes 12 pro` vided in the lett hand portion 5 of the cam sleeve. Alfter the piston, the blades 15 and the sleeve 5 have thus been assembled, the said parts are pushed from the right into the casing 1, whereupon the cylindrical portion 2 of the casing is screwed into the casing 1 and i'iXed therein by means of the set screw 4. By thus screwing` the cylindrical casing 2 into the casing 1 the packing rings 19 are securely held between the shoulders of the casings 1, 2 and the sleeve '5 so as to produce a tight joint. The packing rings 2O are held in tight contact with their' bearing faces on the portions 9 and 10 et the piston by means ot sleeves 21 which are screwed into the casings 1, 2. means ot the said sleeves the pressure ot the bushings (3 on the rings 20 can be adjusted according to the wear of the packing. Lubricant is admitted to the shat 7 through bores drilled through the bushings 6 and which communicate with periforations 4formed through screws 2a screwed in holes ot the casings 1, 2. 'These screws press ben ath them and upon bushings 6 and washers in order that no luid under pressure escaping trom the piston chamber can leak out through the oil gland or escape along the shaft. The sleeves 21 are provided with suitable packing rings 22 in order to prevent loss of lubricant.

In the preferred iorm ot the invention the rods 27 are adjusta'bly iitted between the blades 15. Thereby the relative distance between opposite blades can be adjusted to the inner diameter oi the cam sleeve 5, both initially, and in compensation for wear, so that a tight lit between the blades and the cam sleeve may always be maintained.

When the piston rotates within the sleeve the blades 15 are shifted radially within the grooves 1.41 Yformed in the portions 9 and 10 and the ring 11. The blades are held securely to slide in the piston throughout the cycle of rotation, and the pressure on the blades is directly transmitted,-either to rotate the shaft in response to lluid pressure, or to drive iiuid in response to rotative torce. The ring 11, secured by screws forms 'functionally an integral part oft the piston and the groove in it part ot the slot in which the blade slides.

1 claim herein as my invention:

1. ln a machine ot the class described, the combination. with a rotary piston having at its ends radially projecting flanges one oit which is formed as a ring removably secured to said piston, the said piston being provided between its Vflanges with substantially radial pockets, and blades mounted tor reciprocation in said pockets, oit a cylinder enclosing said piston and arranged eccentrically with respect thereto, upon the inner wall of which when the parts are assembled the said blades bear, said cylinderT piston, and blades itorm- 120 ing chambers the capacity of which is alternately reduced and increased upon rotation of the piston, and a fluid inlet and outlet for said chambers.

2. 1n a machine oi' the class described, the combination, with a rotary piston having at its ends radially projecting flanges one of which is formed as a. ring removably secured to said piston, said piston between said flanges being provided with substantially 130 radial pockets, and blades mounted for re ciprocation in said pockets, of a cylinder enclosing said piston, a sleeve within said cyloutlet for J,said chambers.

3; 1n a machine of the class described, the combination, with a rotary piston having at its ends radially projecting ilanges one of which is formed as a ring removably secured to said piston, said piston between said flanges being provided with substantially radial pockets, and blades mounted for reciprocation in said pockets, of a cylinder enclosing said piston, a sleeve within said cylinder and when the parts are assembled standing in eccentric position relative to said piston, the said blades engaging the bore of said sleeve, said cylinder affording bearing for the sleeve at one end, a body secured to the cylinder and affording bearing for the said sleeve at the other end, said sleeve, piston, and blades forming chambers the capacity of which is alternately reduced and increased upon rotation of the piston, vand a fluid inlet and outlet for said cham-- bers.

l. In a machine of the class described, the combination, with a shaft, a rotary piston borne therein andehaving at its ends radially projecting flanges one of which is formed as a ring removablyk secured to said piston, said piston between said flanges being provided with substantially radial pockets, and blades mounted for reciprocation in said pockets.` of a. cylinder enclosing said piston, a sleeve within said cylinder and when the parts are assembled occupying an eccentric position relative to said piston, the said blades engaging the bore of said sleeve, said cylinder affording bearing for the sleeve at one end, a head secured to the. cylinder, said cylinder and head being provided with bushings for said shaft and said head affording an opposite end bearing for said sleeve, said sleeve, piston, and blades forming chambers the capacity of which is alternately reduc-ed and increased upon rotation of the piston, and a fluid inlet or outlet for said chambers.

5. ln a machine of the class described,` the combination with a rotary piston having at its end'radially projecting flanges one of which is formed as a ring removably secured to said piston, the said piston between said flanges being provided with substantially radial pockets, and blades mounted for reciprocation in said pockets, of a cylinder enclosing said piston, a sleeve within said cylinder and when the parts are assembled standing in eccentric position relative to the piston, the said blades engaging the bore of the sleeve within, said sleeve being formed with flanges overlying the said llanges ofthe piston, said sleeve, piston, and blades forming chambers the capacity of which is alternately reduced and increased upon rotation of the piston, and a fluid inlet and outlet for said chambers.

6. ln a machine of the class described, the combination with a rotary piston having at its ends radially projecting flanges onek of which is formed as aA ring removably se- 'cured to said piston, said piston between said flanges being provided with substan-` tially radial pockets, and blade-s mounted ior reciprocation in said pockets, of a cylinder formed of two cylindrical sections connected with each other and enclosing said piston, a sleeve within said cylinder and when the parts are assembled standing in eccentricposition relative to said piston, the said blades engaging the bore of the sleeve within, said sleeve being formed with flanges overlying said flanges of the piston, the said sect-ions of the cylinder provided with shoulders which engage said sleeve flanges, said sleeve, piston, and blades forming chambers the capacity of which is alternately reduced and increased upon rotation ol the piston, and a fluid inlet and outlet for said chambers.

7. ln a machine of the class described, the combination, with a rotary piston having at its ends radially projecting flanges one of which is formed as a ring removably secured to said piston, said piston between said llanges being provided with substantially 'radial pockets, and blades mounted for reciprocation in said pockets, of a cylinder t'ormed of two cylindrical sections connected with each other enclosing said piston and provided internally with a sleeve which when the parts are assembled stands with bore in eccentric position relatively to the contained piston, the blades of the piston engaging the bore of the sleeve, bushings in said cylindrical sections abutting upon the said end flanges of the piston, means to adjust the bushings relatively to the piston, said sleeve, piston, and blades forming chambers the capacity of which is alternately reduced and increased upon rotation` of the piston, and a fluid inlet and outlet for said chambers.

S. In a machine of the class described the combination ot a rotary shaft, a piston integralwith the shaft and arranged intermediate the length thereot` said piston consisting of enlarged terminal cylindrical portions and an intermediate cylindrical portion oit smaller diameter, a slot extending diametrically through the cylinder throughont the length of the intermediate portion and part way through the length of the terminal portions, a blade extending through said slot and exceedingv in its length the diameter or the intermediate portion or the piston, a cylindrical casing enclosing)- the intermediate portion of said piston with respect to which when the parts are assembled the piston is eccentric, the said casing consisting ot an integral cylindrical body and a removable head, together with means (when the parts are assembled) for admitting; 'luid to and receiving` fluid from the space formed by and between piston casing,- and blades, the volume of which space as the piston rotates increases and diminishes.

9. ln a machine of the class described the combination or a rotary shaft, a piston integral With the shaft and arranged intermediate the length thereof, said piston consisting ot enlarged terminal cylindrical portions and an intermediate cylindrical portion of smaller diameter, a slot extending diametrically through the cylinder throughout the length of.' the intermediate portion and part Way through the length oit the terminal portions, a. blade ot adjustable length extending' through said slot and exceeding in its length the diameter of the intermedi ate portion of the piston, a cylindrical casing; enclosing the intermediate portion of said piston with respect to which when the parts are assembled the piston is eccentric, Jhe said casing' consistingof an integral cylindrical body and a removable head, together with means (when the parts are assembled) for admittingr fluid to and receivinglluid from the space formed by and between piston casing and blades, the volume ot which space as the piston rotates increases and diminishes.

l0. In a machine of the class described the combination of a rotary shaft carrying; a piston integral with itself anzid a casing forming', together with the piston, a chamber to contain fluid under pressure, a bushing' carried in the casing Within which, when the parts are assemblech said rotary shaft extends, an oil `gland consisting` of a chamber formed in the body of the easing and a duct opening from the chamber througl'i the said bushing, a perfora'te body of plastic material arranged Within the chamber abutting` upon .said bushing and overlying the line ol' meeting` ot' the body of the casing and the body ot the bushing;` having its perforation aligned with said duct and means for exerting upon said block of plastic material deformingpressure.

FRITZ 'EGERSDRFER 

